TETRAGON
Meaning of TETRAGON in English
/te"treuh gon'/ , n.
a polygon having four angles or sides; a quadrangle or quadrilateral.
[ 1620-30; tetrágonon. See TETRA-, -GON ]
Random House Webster's Unabridged English dictionary.
Полный английский словарь Вебстер - Random House .
2012